Allan macbeth



A. MACBETH.

NON-METALLIC WALL FOR RESERVOIHS.

APPLlcAloN FILED AuG.22.191a.

1,325,448. Patented 1190.161919.

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' klc/ INVENTOR ATTORNEYS 'UNITED sTATEs PATENT oEEIcE.

ALLAN MACBETII, oP PARIS, FRANCE, AssIeNoR To STE. TIIE DUNLOP RUBBER co.

LIMITED, or PARIs, ERANcE.

NON-METALLIC WALL FOR RESERVOIRS.

Specification of Letters Patent.

Patented Dec. 16, 1919.

Application[filed` August 22,1918. Serial No. 251,005.

To all 'whom it may concern: l

Be it known that I, ALLAN MAGBETH, a

subject of the Kingdom of Great Britain,

residing in Paris, France, have invented certain new and useful Improvements 1n Non-Metallic Walls for Reservoirs, of which.A

the following is a specication.

The present invention has for its object a reservoir intended to contain hydrocarbons and capable of -resisting without damage perfor-ations caused by projectiles.

'This reservoir, which is particularly applicable to aerial apparatus, does not contain any metallic parts, so that it avoids com.- pletely the disadvantage which the laceration of these parts offers, which occasions most of the time appreciable deteriorations in a protectiveV sheathing provided to guard against leakages arlsing from perforations.

This reservolr may be conveniently con-f structed according to anexceedin y simple process. It is constituted broadly by a relatively flexible wall, capable of closing up itself its leakages after per-forations, and maintained by a light frame work intended to impart the necessary rigidity.`

In the majority of cases, the wall being of india rubber or a material which is more or less soluble in hydrocarbons, it is necessary to stretch over the interior a protecting layer ofv a substance which is not attacked by them.

.The following description which gives by way of example one method of constructing the` reservoir, forming the subject matter of this invention, will enable the peculiarities and advantages of (this reservoir to be properly understood.

In this example, there are used as the flex-- ible wall insensible to perforations, several sheets of india rubber, and as the protectgum lac.

' substances.

A sheet of vulcanizable rubber of from 2 to 3 millimeters in thickness.

Rubber containing little or no sulfur, 7 to 10 millimeters in thickness.

A sheet of vulcanizable rubber 2 to 3 millimeters in thickness.

- The whole thus constituted is vulcanized in order to obtain a compact, rigid and homogeneous mass and there is thus obtained a reservoir devoid of any metallic parts and capable of resisting under good conditions the perforation by a large number of projectiles.

The reservoir may be finally surrounded by a light, lattice work metal or other framework, either to replace the framework of hardened rubber or to complete the rigidity conferred by this latter.

The accompanyin drawing illustrates one mode of applying t e invention.

yFigure 1 being an elevation or exterior view of the reservoir;

Fig. 2 a fragmentary section on a larger scale, and

Fig. 3 a fragmentary dissected plan, the

latter showing a modified location for thel strengthening framework.

A is the reservoir as a whole and B the metal lattice or other framework.

Iu Figs. 2 and 3 a indicates the layers of gum lac orthe like; b the layer of gutta -percha, balata or similar substance; c the ramework of hard rubber or semi-hardened rubber; d and f sheetsof v-ulcanizable rubber, and e the intervening layer of non-vulcanizable rubber or natural gum.

In Fig. 3 the stifening framework con- `sists of a metal lattice c in place of the hard rubber layer ,c and this may replace the external metal lattice B.

It must be understood that themethods of carrying out the process and constructing the reservoir may vary within wide limits, the principle of the invention, which consists in the absolute elimination of the metallic 'vulcanized fabric between which said layer 10 Walls, beingalways the same. is confined. l

What I claim and desire to secure by Let- In Witness whereof, I have hereunto ters Patent of the United States is :w-v signed mylname in the presence of two sub- A petrol reservoir having a non-metallic seribing witnesses.' wall, an inner coating of `material insoluble ALLAN MACBETI-I. in the lighter hydrocarbons and an outer Witnesses: self-sealing envelop comprising a layer of JOHN F. SIMoNs,

non-Vulcanizable rubber and two sheets of HENRI CARTIER. 

